Six wheel truck



C. L. ORR

SIX WHEEL TRUCK Nov. '20, 1934.

Filed 001. 25, 1930 5 SheetS-Sheet l Nov. 2o, 1934. Q 1 @RR 1,981,118

SIX WHEEL TRUCK Filed OCb. 23. 1950 3 SheebS-Sheei. 3

Patented Nov. 20, 1934 'SIX WHEEL `TRUCK .Claude L. Grr, Columbus, Ohio,

assignor to The This invention relates to improvements lin car trucks,and more especially to a novel six-Wheel truck.

A truck constructed in accordance with the present invetion, has adifferent system of equalization than the standard six-wheel trucks usedfor many years, and the parts are so combined and arranged thatelliptical, as well as helical springs can be used either incombination, as shown, or the spring groups can be composed entirely ofone or the other types.

The main ,objects of the invention are; to provide a truck made up ofparts which are of a size economical to produce in foundry or forageshops; to furnish a truck in which the/transverse holsters enter theside frame ensembles midway between the center lines of the adjacentaxles, this both simplifying the transversebolster design and renderingit easy to use elliptical springs, as Well as helical, .or a combinationof the two types; and to provide a six-wheel truck in which the load oneach side is equally distributed among the three axle journals andwheels, the equalization being independent of spring travel for ordinarytrack conditions.

Another object is to .provide a truck of this type, `so constructed thatwhen the truck runs over uneven track, which puts the wheels and axlesin diierent planes, an equalizing system forming part of the truck willfunction to maintain the planar relation of the various parts of thebolster system.

With the foregoing objects outlined and with other objects in view which.Will appear as the description proceeds, the invention consists in thenovel features hereinafter described in detail,` illustrated in theaccompanying drawings, and more particularly pointed out in the appendedclaims.

In the drawings,

Fig. 1 shows at the left hand side, a top plan View of the improvedtruck, and the upper right hand portion of this View is a horizontalsection on the line B-B of Fig. 2, While the lower right hand portion ofthe figure is a hori- Zontal section onthe linefC--C of Fig. 2.

Fig. 2 is a side elevation kof .the truck partly in vertical section,the section being taken on the line A-A of Fig. 1.

Fig. B is va transverse vertical sectional View on the lineB-B of Fig.1.

In accordance with the present invention, the truck consists of acentral axle 4 and. end `axles 5 which .are connected vto .the ywheelsv6 running -on tracks 7. There are three sets-of these wheels., Vand theaxles of the end wheels are 'journaled 'in boxes 8 which are graspedfby*the jaws of end members Stof the side frames,lthere yof course beingaside frame `at eaohside of the truck.

The Ainner end of each member 9 rests on a' shelf 10. These shelvesproject forwardly and rearwardly from the journal box 11 ofthe centeraxle, and each shelf has a parti-cylindrical seat 12 which receives thecomplementarygsur- `face of a projection 13 arranged at the inner of.the member ,9. vDue to this construction, it is apparent that each endmember Vmay rock `relatively to its seat l2.

A bolster opening 14 is provided .in each end 'inember, and the verticallaxis of said ,opening is vmidway between the axes of the center axle,.and one of the end axles, and transversebolsters v15 have .their endsprojectinginto these bolster openings. The holsters rest uponspringjgroups in the bolster openings, and in the embodiment of Itheinvention illustrated, veach group comprises an elliptical spring 1'6,Aand a pairofhelcal Springsll `The elliptical spring extends'transversely of the truck, and is accommodated by a recess 1 8in theunderside oi "the bolster,

'whilethehelical springs are arrangedat opposite sidesof the ellipticalspring. vThe,springs oi each group rest upon a spring seat Al9gthat ispositioned within the end member 9 and extends ,across the lower end ofthe 'bolster opening. Each spring seat has a part-cylindrical projectionZ0 on its under side, Whichen- .gages a lcomplementary seat in lthetop'of `a rockable'lever 21 which supports thespring seat. One end ofthe .lever has a partcylindrical rprojection 22 which 'engages acomplementary `'seat on the .bottom portion 23 of the end member,

and ythis-bottom portion is cutaway at ,24a to allow the lever to rock.

.A hook 24 lis positioned at the opposite end oi the vlever and Vhas arounded under surface that engages a complementary surface of .a crosspin 25 that is supported by asuspended 'link 26.

The `upper end o'f -the link has ya Vsimilar pin 27 which may rock inthefseat 28. Therejarewtwo oi these yseatsat the opposite ends of an'quallsur f aces 33 ,onftheir under sides to .engagefcurv'ed convexsurfaces 34" projecting upwardly from the members 9. Bolts V35`. p ass,izliroligh "apertures in the members ,9, `and the of the .in-

f bearing 12.1

termediate frame for pivotally securing these parts together.

As the links 26 are arranged within the members 9, the inner end of eachof said members is apertured at 36 and 37 to permit access to itsinterior, and to accommodate the parts which pass through or move withinthe same.

Provision is made at 38 for the introduction of bolts or pins throughthe flanges 39 of the center axle journal box, and the inner ends of theframe members 9, whereby in case the truck is lifted from the track, thecenter axle and journal box will 'be carried by the bolts or pinsinserted at these points. 11 i a f The transverse bolsters carry a mainor central bolster 40 which has a center plate 41, and

bears at its corners by inclined bearing surfaces j 42 upon thetransverse bolsters. Where the bearings are located, the central bolsterhas depending jaws 44 which extend downwardly alongy the sides of thetransverse bolsters and Aact to tie the bolster ensemble together.'

. VThe main bolster also has side bearings 45 to take a` portion of theload when the car ysways.

' It will be noted that each of the intermediate frames 32 is ofinverted channel-shape, with the exception at its central portion, wherethe cradle 31 bridges the channel.

VTheload on thetruck is applied to each of the four .end frame members 9at the bearing surfaces 22 and 33. This load is then distributed equallyamong the three journals on each side of the truck, because the centerorV the bearings 22 and 33 lie in the same vertical plane, and thisplane isy located with respect to the center line of the end axles 5,one-third the dis. tance between the center of the end axle and thecenter of the bearing 12. By utilizing this principle of mechanics, ifthree units of load are applied at the bearing points 22 and 33 on oneside frame, thenA two units would be supported by the end journal, andone unit by the The other end of the side frame system will Aactsimilarly, so that one unit of Aload will .rest on each ci the bearings12, making two units'for the 'center journal and two units for eachr ofthe end journals; thus the load is equally distributed. Both sides ofthe .truck are, of course, similar.

y, It is not absolutely necessary to have the centers of the bearings 22and 33 lie in the same vertical plane, providing the resultant of theloads ofrthese two bearings lies in a vertical plane located in acertain place with respectl lto the end journal and bearing 12.

a When the truck runs over uneven track, put lting the wheels and axlesin different planes, the equalizing system functionsI so as to maintain4the planar relation of the various Vparts of the is accomplished bythe. fequalizing beams 29rocking on their cradles 31, andals'o by thecenter axle journalbox 1l rotating about the center axle'4.

vbolster system. This While I Vhave disclosedwhat I now consider 'to be"'a rpreferred embodimentof thev invention in such manner that the samemay be readily understood by those skilled in the art, I am aware that.changes may be made in the details ldisclosed,without departing` fromthe spirit of the invention, as expressed in the claims.

What I claim and desire to7 secure by Letters Patentis:

six-wheel car'truck comprising a center axle"`and 'end axles, 'journalboxes on the axles,

side frames mounted on the journal boxes, each side frame including acentral member and end members, each end member resting partially on oneof the end axle journal boxes, and at its other end on the centralmember, an intermediate frame pivotally connecting the end members,` arocking beam supported by the intermediate frame, transversebolstersextending into the end members, and means including springs forpartially supporting said bolsters by said beam. V

2. A six-wheel truck comprising a center side frame member, end sideframe members rockably engaging the center member, a central axle onwhich the center `member is mounted, the end members being arranged intheir entirety at opposite sides of said axle, an intermediate framepivotally connecting the end members and extending rover the centermember, a rocking beam supported by the intermediate `frame, transversebolsters extending into said end members,y means including rockinglevers for sup-'- porting said bolsters, and means operativelyconnecting the rocking beam to said rocking levers.

3. A car truck comprising wheel supported side frames, yeach side frameincluding a center member and end members rockably engaged therewith,the center member having integral oppositely projecting bearing seatsfor directly supportingv the end members from below, each yend memberhaving a bolster opening, a lever extending acrcssrthe lower end of thebolster opening of each of said end members and having one of its endsrockably-supported on the end members, transverse bolsters extendinginto the end members, levers supporting said bolsters, each leverYhaving one of its ends rockably mounted on one of the end members, andequalizing means supported by the intermediate frame and operativelyconnected tothe opposite ends of the levers. V

5 Inra car truck, a side frame Vcomprising wheel supported end members,an intermediate frame having its ends rockably mounted on the endmembera'transverse bolsters extending into the end members, leverssupporting said bolsters, each lever having one of its ends rockablymounted on onelof the end members, and'equalizing means "supplted by theintermediate frame and operatively connected to the opposite ends of thelevers, the point where the end of each lever rests on an end memberbeing substantially in vertical alignment With the point i.

wherev the same4 end member engages an end of the intermediate frame.

6.`In a car truck, a sideframe comprising wheel supported end members,an' intermediate frame having its ends rockably mounted on the frame andoperatively connected to the opposite ends of the levers, the equalizingmeans including a beam rockably supported by the intermediate frame.

7. In a six-wheel car truck, a center axle and end axles, wheels on theaxles, side frames supported by the axles, each side frame comprising acenter member and end members rockably engaging one another, anintermediate framehaving its ends resting on the end members andprovided with a cradle, an equalizing beam carried by the cradle, linkshaving their upper ends supported by the beam, levers, each lever havingone of its ends resting on an end member and its other end connected tothe lower end of one of the links, a spring seat on each lever, springmeans supported by each seat, transverse bolsters resting on the springmeans, and a center bolster carried by the transverse bolsters.

8. In a six-wheel car truck, a center axle and end axles, wheels on theaxles, side frames supported by the axles, each side frame comprising acenter member and end members rockably engaging one another, anintermediate frame having its ends resting on the end member andprovided with a Cradle, an equalizing beam carried by the cradle, linkshaving their upper ends supported by the beam, levers, each lever havingone of its ends resting on an end member and its other end connected tothe lower end of one of the links, a spring seat on each lever, springmeans supported by each seat, transverse bolsters resting on the springmeans, and a center bolster carried by the transverse bolsters, each endmember and the intermediate frame having a rockable bearing at the pointwhere the intermediate frame bears upon an end member.

9. In a six-wheel car truck, a center axle and end axles, wheels on theaxles, side frames supported by the axles, each side frame comprising acenter member and end members rockably engaging one another, anintermediate frame having its ends resting on the end members andprovided with a cradle, an equalizing beam carried by the cradle, linkshaving their upper ends supported by the beam, levers, each lever havingone of its ends resting on an end member and its other end connected tothe lower end of one of the links, a spring seat on each lever, springmeans supported by each seat, transverse bolsters resting on the springmeans, and a center bolster carried by the transverse bolsters, thesurfaces of the intermediate frame and beam being curved where theycontact, to provide a rockable support for the beam.

10. In a six-wheel car truck, a center axle and end axles, wheels on theaxles, side frames supported by the axles, each side frame comprising acenter member and end members rockably engaging one another, anintermediate frame having its ends resting on the end members andprovided with a cradle, an equalizing beam carried by the cradle, linkshaving their upper ends supported by the beam, levers, each lever havingone of its ends resting on an end member and its other end connected tothe lower end of one of the links, a spring seat on each lever, springmeans supported by each seat, transverse bolsters resting on the springmeans, and a center bolster carried by the transverse bolsters, eachlink being pivotally connected to an end of the equalizing beam.

11. In a six-wheel car truck, a center axle and end axles, wheels on theaxles, side frames supported by the axles, each side frame comprising acenter member and end members rockably engaging one another, anintermediate frame having its ends resting on the end members andprovided with a cradle, an equalizing beam carried by the cradle, linkshaving their upper ends supported by the beam, levers, each lever havingone of its ends resting on and end member and its other end connected tothe lower end of one of the links, a spring seat on each lever, springmeans supported by each seat, transverse bolsters resting on the springmeans, and a center bolster carried by the transverse bolsters, eachlever being pivotally connected to one of said links.

12. In a six-wheel car truck, a center axle and end axles, wheels on theaxles, side frames supported by the axles, each side frame comprising acenter member and end members rockably engaging one another, anintermediate frame having its ends resting on' the end members andprovided with a cradle, an equalizing beam carried by the cradle; linkshaving their upper ends supported by the beam, levers, each lever havingone of its ends resting on an end member and its other end connected tothe lower end of one of the links, a spring seat' on each lever, springmeans supported by each seat, transverse bolsters resting on the springmeans, and a center bolster carried by the transverse bolsters, the endof each lever which rests upon an end member being curved to rock onsaid end member. l

13. In a six-wheel car truck, a center axle 120 and end axles, wheels onthe axles, side frames supported by the axles, each side framecomprising a center member and end members rockably engaging oneanother, an intermediate frame having its ends resting on the end mem-125 bers and provided with a cradle, an equalizing beam carried by thecradle, links having their upper ends supported by the beam, levers,each lever having one of its ends resting on an end member, and itsother end connected to the 130 lower end of one of the links, a springseat on each lever, spring means supported by each seat, transversebolsters resting on the spring means, and a center bolster carried bythe transverse bolsters, the surfaces of contact between the 135 springseat and each lever being rounded to allow the lever to rock relativelyto the spring seat.

CLAUDE L. ORR.

